Lock and latch mechanism



Jan. 6,1931.` Eff-'LAGG I 1,788,237` LOCK AND LATCH MEGHANISM 'FiledApril 26, 1928 4 sheets-sheetv 2 mim lNVENTOR wnNEssEs I f f/ y Z 'gf yy aff, n .5 ATTORNEYS Jn.16,1j931. y v im@ 1,133,213;

i y` Loox AND LATCH yMEGHANISM Filed April 2e, ,1928 4 sheets-sheet Y 4v l lNvENToR Lggf/m5277617?, i

ATTORNEYS V NEsss I I n n @g Patented Jan. 6, 1931 PATENT OFFICE EmmerFLAGG, or NEW vom, N. YQ

LOCK .AND LATCH MECHANIBM Application led April 26, 1928. Serial No'.278,041.

la strained means'for projecting the same into a keeper when registeredtherewith, together with knob actuated means for retract-ing the boltand key actuated means for rendering the knob actuated means effectiveand ineffective kwhereby the mechanism serves in the dual capacity of alatch and lock.

As a further feature, the invention comprehends in a lock and latchmechanism for doors, a knob controlled means for retracting the bolt,means controlled by a key insertable from the exterior for rendering theknobV controlled means effectivek and inefective, together with apermanent actuator for said latter means provided on the interior of sothe door which performs the function offa key used on the interior. Morespecifically, the invention contemplates in a combined lock and latchmechanism for doors, a common bolt arranged in a housing carried by thedoor, which bolt is adapted to cooperate with'a kee r on the door frameand which bolt is projected into the keeper when the door is closed byvirtue of a normally restrained projecting means, a 40 turnable knobbeing provided having oper- 'ative connection with the bolt forretracting the same while a meanscontrolled by anfinsertable andremovable key is established for establishing or breaking theAconnection to render the knob respectively eective or ineffective.

`The invention furthermore embodies in a combined lock and latchmechanism of the character set forth a key actuated tumbler A assemblagewhich normally serves to render be employed in `connection with a -ltskeeper with the kno -nism inelectiveand the bolt sub'ect to rethe boltretracting knob eHect-ive but which when manipulated ,bythe key disposesthe tumblers in such a manner as to render the bolt retracting knobineffective.

As a still further object, the invention comprehends av tumblerassemblage including key engaging and actuating portions for separatecooperation with a regular key and with a master keywhich master key mayplurality .0 of tumbler assemblages. v

Other objects of the invention reside in the comparative simplicity ofconstruction and mode of `operation of themechanism, the economy withwhich -it may be produced and the general eiiciency derived therefrom.

With the above recited and other objects in view, reference is had tothe following description and accompanying drawings, in which there isexhibited one example or em- 7 bodiment of the invention, While theclaims define the actual scope of the same.

.In the drawin s:

Figure 1 is a ongitudinal sectional view through the lock taken aproximately on the line indicated at 1-1 in Figure 5 and illustrating thelocking mechamsminactive and the` bolt retreating knob operativelyconnected with the bolt.

Figure 2 is a similar view illustrating the mechanism with the boltengaged iny the keeper as a latch and subject to retraction by the knob.

Figure 3 is a similar view illustrating the position of parts as thesame are being moved from the knob control to the locked condition.

Figure 4 is asimilar view illustrating the position of parts showing thebolt engaging actuating mechatraction only after operation o the keymechanism. n 4

Figure 5 is a vertical sectional View taken approximately on the line5--5 of .Figure 95 4 and on a slightly larger scale.

Figure 6is a sectional view taken approxi'- mate y on the line 6--6 ofFigure 3.

Figure 7 is a detail sectionalrvie'w taken approximately on the line 77v of FigureA 5. 19

stile in the usual manner.

Figure 8 is a sectional view taken approximately on the line 8 8 ofFigure 2.

Figure 9 is a perspective view of the keeper.

Figure 10 is a perspective View of the bolt projecting arm.

Figure 11 is a perspective view of the bolt.

Figure 12 is a perspective view of the rack-bar shifting arm.

Referring to the drawings by characters of reference, A represents adoor frame and B the door. The combined lock and latch mechanismincludes a housing 15 which is preferably arranged in a mortise in thedoor A common bolt 16 is mounted within the housing for projectionthrough the bolt opening 17 of the face plate 18 of the housing, fromits normally retracted position withinthe housing. The bolt 16 isrecessed at 19 to receive the forward end ofva bolt retracting rack bar20, which forward end is provided with a knuckle 21 receiving atransverse pin 22 extending through the bolt and pivotally connecting`the rack bar withl the bolt. A bolt projecting means is also housed bythe housing 15 and the same consists of an arm 23 which is secured to ashaft 24 for turning movement therewith'. The free end of the arm isbifurcated and the furcations 25 straddle the forward portion of thebolt retracting rack bar 20 and engage the knuckle por,- tion 21thereof. The arm 23 is normally swung in a position to project thebolt16 from the housing by a flat spiral spring 26, one terminal of which isanchored to a collar 27 on the shaft 24 while the opposite terminal 28is hooked around an anchoring point. The tendency of the convolutions ofthe spring 26 to unwind causes the shaft 24 to turn in a clockwisedirection and hence swings the arm to the left in Fig. 1, therebyprojecting the bolt 16 through the bolt opening 17.

' Inorder' to provide means for normally restraining the bolt againstprojection and for releasing the same when the door is closed and inregistry with the bolt keeper, a depending lug 29 is formed on the boltadjacent its rear end and said lug is engaged behind an upwardlyprojecting detent 30 o n a detent lever 31 which is fulcrumed forlateralswinging movement on a pivot 32 which projects upwardly from thebottom wall 33 of the housing. The detent lever is normally swunglaterally to dispose the detent 30 in front of the bolt lug 29 vby acoiled expansion spring 34 which engages between the rear notchedterminal of the detent lever and the side wall 35 of the housing. Atransverse guide' pin 36 extends through the notched rear terminal ofthe detent lever and the spring 34 lsurrounds said pin. The forward arm37 of the detent lever impinges against a plunger'38 which is mountedfor on the door frame in the usual manner and is provided with anextension 43 disposed at a right angle thereto. The extension isprovided with an outwardly projecting finger 4.4 which is adapted to beengaged by the plunger head 4() when the door is moved to the closedposition. This effects a relative movement of the plunge;` 38 within theplunger opening 39 and results in effecting through its engagement with,the detent lever arm 37 a lateral swinging movement of the detent leverto throw the detent 30 from engagement with the bolt lug 29 so that thespring 26 functions to project the bolt 16 into the keeper. It isobvious that from this arrangement Vthe bolt 16 is always retractedwithin thehousing and within the confines of the door edge except whenthe door is in .closed relation -to its frame. Obviously, this preventsthe catching and tea-ringlofthe clothing on the bolt or damage -to t eperson which might otherwise be caused if the bolt is in a projectedposition when the door is open.

`The mechanism includes a bolt retracting means which consists of aspindle 45 extending transversely through the door and throughthehousing 15, said spindle being provided with knobs 46 attached to itsopposite ends. A pinion 47 is carried by the spindle for turningmovement therewith and its teeth 48 are normally designed to engage withthe rack teeth r49 on the rack bar 20. It thus follows that when thedoor has been closed and the bolt v16 projected into the socket 42 ofthe keeper 41, it is only necessary to manipulateveither of the knobs toturn the pinion 47 in a clockwise direction for retracting the bolttoopen the door. When the bolt has been retracted through the medium ofthe knobs, the initial movement of the door to an open position willrelieve the pressure of the finger 44 on the plunger 38, therebyallowingthe spring 34 to function to swing the detent lever 31 toaposition to dispose the detent 30 in front ofthe bolt lug 29. This,obviously, will hold the bolt retracted against projection by the spring26 until such time as the door is again closed.

In order to provide means for rendering the knob retractin mea-nsinefect-iveor inoperative so that t e door when closed will be lockedagainst retraction by manipulationl of the knobs, a suitable keycontrolled tumbler organism is employed for use in connection with adevice for moving the teeth of the rack bar 20 out of engagement withthe pinion 47. The device for shifting the rack bar consists of an arm50 which is fulcrumed for swinging movement on a transverse pin 51 andwhich is engaged by and connected at its free endV 52 with the hookedterminal.28

of the spring`26. The arm 50'is Provided with dependinglaterally spacedknuckles 53 carrying a transverse pi'n54 which also extends throughailongitudinal slot 55 in the rack bar 20. Thel arm 50 is furtherprovided with an upstanding flange 56 at one edge thereof, the purposeof which will be hereafter set forth. The army is also provided with atransversely disposed T-shaped rib 57.

The tumbler assemblage includesy a plurality of tumbler plates 58arranged in side by side relation within the upper portion of the.housing 15 for relative longitudinal sliding movement on transversesupporting pins 59 which extend through slots 60 provided'in the tumblerplates. The lower ends of the tumbler plates are formed with'T- shapedlnotches 61, the restricted portions 62 of which correspond in lengthapproximately to the Width Aof the T-shaped rib 57 and which restrictedportions extend completely through thelower edge of the tumbler plates.rIfhe tumbler plates are further provided with keyhole slots 63 and 64which are'adapted to be adjusted by their respective keys to an alignedposition which simultaneously disposes the T-shaped notches 61 inalignment, it being understood that the notches 61 and the keyholeslots'are normally disposed out of alignment under the action ofa'tumbler spring 65 which engages with they rear edges 66 of the tumblerplates. obvious that the rear edges 66 are Ldisposed in alignment whentheT-shaped notches 61 and the keyhole slots 63 and 64 are staggered orout of alignment. The keyhole slots 63 are adapted to receive a regularkey 67 which is provided with suitable notches 68 in itsshank tocorrespond with the arrangement of the keyhole slots 63 so that whenjthekeyA is inserted and turned infthevproper direction, the T-shapednotcheswillj be aligned and moved as illustrated invFigures 3 and 4 to aposition which'will admit ythelT-shaped rib 57 through the restrictedportions 62 of t-he T-shaped notches 61, it being understood that thespring 26 will effect the upward swinging movement of the arm 50.Obviously, this moves the rack bar 2O to a position where its teeth 49are out of engagement with the teeth 48of the pinion 47. When thisoccurs, it is apparent that when the door i'sclosed and the bolt 16 shothome into the opening 42 'of the keeper, the knob spindle isinelfectivefor the purpose of retracting the bolt and it is necessarylto insert the key through a suitable key barrel 69 having a keyholeslot 70 for the purpose of again arranging' the tumblers and actuatingarm 50 to swing the arm 50 downwardly to cause a 're-engagement of therack teeth with the pinion. The means for swingingthe arm downwardly byuse of the key 67 rconsists of a collar` 1 mounted for rotation in abearing opening 72 'in the Wall 35 of the-housing, the bearing being Itis, therefore,

the master keyhole notches 64 and the collars 71 and 74 are providedwith interengaging gear teeth 75 and 76 so that turnin movement of thecollar 71 is transmitte to the collar 74. The collar 74 is'provided witha radial cam finger 77 which is designed to engage with the upper edgeofthe flange 56 of the arm 50 tocam or move the arm downwardly. It is,of course, to be understood that after the T-shaped slots 61 have beenaligned and moved to a position to receive the T- shaped rib 57, thatwhen thekey is removed the spring 65 functions to again stagger thetumbler plates so that the rib 57 is locked and retained in place toadditionally secure the mechanism in its locked condition. It

should also be understood that the movement of thel key in unlocking thedoor allows the sprin 65 to disalign or stagger the notches 61 be oreremoval of the key so as vto prevent the rib 57 from re-ente'ring thenotches and to thus maintain the' unlocked conditionv of the bolt. Inorder to prevent possible forcing of the bolt inwardly by a jimmy orother tool, it will be observed that' the rack bar 2O when movedupwardly to the'position illustrated in Figure 4 has its rear terminaldis osed in alignment with and inv close proximity to a 'rib 78 whichprojects inwardly from the rear wall 79 of the housing 15. It is, ofcourse, understoodv that themaster key and the master keyhole slots 64perform identically they'same function asf-the regular key 67 exceptthat the tumbler plate actuating notches will be differently arrangedfrom the regular key while they will be common to a plurality of locksof the same general character. g v v l In Order to provide apermanentmeans operable from the interior of the door to function in thesame capacity as the keys, an actuatorelement 80 is operativelyconnected with the collar 71 for the purpose of turning'the collars 71and`74. The actuator element 8O has connected therewith a manip-fulating button 81 whichprojects inwardly of the door and which serves asthe means for turning the element. The actuator element has keyedtheretoby a key 82 a sleeve 83, which sleeve -is provided adjacent oneyof lits ends with gear teeth 84.` A second sleeve `85 is carried by astub shaft 86 for turning movement therewith and said latter sleeve Aisprovided with gearteeth 87 designed to mesh with the gear teeth 84. Aspring strip 89 has one terminal 89 anchored to the sleeve 83 and isspirally coiled and loosely wound around the sleeve. as illustrated inFigure 7. The othery end is reversely coiled and partly trained aroundthe sleeve 85 with its terminal 90 anchored thereto. The stub shaft 86is connected with an a'xiall aligned stub shaft 91 which lies within t ehousing 15 and which4 has mounted thereon for turning movement therewitha tumbler plate shifting element 92. The tumbler plates are providedwith upwardly projecting lugs 93 lco-related with each other in the samemanner as the keyhole o enings 63 and 64 so that turning of the shi ingelement 92 in a counterclockwise direction, as illustrated in Figure 1,will cause the ear 94 of the shifting element to engage with the lu 93to shift the T-sha ed notches 61 into a ignment with each ot er and intoregistry with the T-sha d rib 57, the element bein further provi ed witha stop ear 95 ywhic en ages with the upper edges ofthe tumbler p ates tolimit its turning movement in counterclockwise direction. In'operation,when the button 81 is manipulated with the parts shown in the positionin Figure 1, the actuator element 8O will be turned in the clockwisedirection indicated by the arrow in Figure 7. This will through theengagement of the gear teeth 84 and 87 effect a. counterclockwise turninmovement of the sleeve 85, as indicated by t e arrow in Figure 7,thereby turningy the stub shafts 86 and 91 to turn the tumbler plateshifting element in a counterclockwise direction, as viewed in Figure 1,causing the ear 94 to engage with the tumbler lugs 93 to shift thetumbler plates to the right in Figure l for disposing the T-shapednotches 61 in alignment with each other and in registry with theT-shaped rib 57 so that the spring 26 will function to swing the armupwardly for disengaging the teeth of the rack 20 from the teeth-of thepinion 47. From this, it is apparent that the closing of the door andrelease of the bolt b the detent means will permit'locking of t e doorso that the same can only be opened'from the exterior vby use of theregular key or master key. It is apparent that when the button 81 isreleased the spring strip y88 will function to .return the same to itsnormal position, permitting the s ring 65 to again Vurge or shift 'thetumb er plates so as to dispose the-T-shaped notches out of alignment.sired to unlock the door from the interior, the button 81 is againmanipulated to turn the sleeve 83 in its clockwise direction so that themeshing of thegear teeth 84 and 87y inin the same direction will allow,dueto the itially eiects the turning of the sleeve 85, the

.- stub shafts 86 and 91 and the shifting element 92 in acounterclockwise direction to cause the ear 94 to engage with thetumbler plate lugs 93 and shift the tumblers to a position where theT-shaped notches 61 are in alignment with each other and in registrywith the rib 57. Continued manipulation of the button 81 disengagementof the teeth 84 and 87, a urther turnin movement of the sleeve 83 whichwill cause t e collars 71 and 74 to be turned When it is deto bring thefinger 77 into engagement with the flange 56 to throw the arm 50downwardly and again eiect the re-engagement of the teeth 49 of the rack20 with the teeth 48 of the pinion 45 so that upon manipulation of theinner knob the bolt will be retracted. `When the button 81 is released,the portion or convolutions of the spring 88 which are now under tensionwill set up a retrograde movement on the sleeve 83 and will cause theparts to be returned to their normal position. During thecounterclockturning movement of the sleeve 83, the gear teeth84 will beagain lre-en aged with the gear teeth 87 so as to turn t e shiftingelement 92 in a clockwise direction to permit of the spring functioningto again stagger the notches 61 so that the lower edges of the tumblerplates engage over and prevent the spring 26 from moving the arm 50upwardly. When one of the keys is inserted from the exterior with themechanism in locked condition, it is obvious that the shifting element92 works in conjunction and simultaneously with the key' actuated meansand its mechanism. l v

What is claimedis: l

1. In a locking and latching mechanism for doors and the like, a commonybolt carried by the door and normally projectable 95 into a kee er onthe door frame, a turnable actuating ob, interengageable means carriedby the knob and bolt for establishing a connection therebetween toeffect the retraction -of the latter by turning of the knob whensaidvmeans are engaged and a key controlled mechanism for effecting theengagement and' disengagement of said means to render the knobrespectively effective and ineiective, said key controlled mechanism in-1 cluding a plurality of shiftable tumbler plates having normalldisaligned notches in one edge adaptedto, aligned by a key, a member fornormallyjeecting the disengagement of` the Vknob and bolt connecting nomeans, said member having a 'rib adapted to enter the notched eds of thetumbler plates when aligned by the ey and means turnable by and withthekey forv engaging and moving said member to a positlon to re-engagethe knob and bolt connecting means.

2.'In a combined latch and lock mechanism', a common lock and latchbolt, a knob, means for connecting the knob with the bolt for retractionby the knob, a common means 1m for projecting the bolt and disengagingthe knob and bolt connecting means and key actuated means forrespectively engaging the knob and bolt connecting means, retaining thesame in connected relation or permitting 126 the same to be disengaged.

3. In a combined latch and lock mechanism for doors or -the like, acommon lock and latch bolt, a turnable knob,means carried by the boltand means, carried by the knob 1:0

v for connectin the same to effect the retracrtion of the bo t uponturning 'of the knob, a common means for projecting the bolt anddisengaging` the knoband bolt connecting 5 means and a. key actuatedmeans respectively operable to engage the bolt and` knob connectingmeans, to allow for their disengagement or to retain them engaged.

Signed at New York, in the county of New lo York and State of New York,this 23rd day of April, A. D. 1928. v l

ERNEST FLAGG.

I .so

